The USS Enterprise engages in a prolonged battle with a Romulan bird of Prey which has crossed the Neutral Zone and attacked several Federation outposts. During the battle it is discovered for the first time that the Romulans are descended from the Vulcans who left their planet when Surak's teachings of total logic began to gain widespread support.16

The USS Enterprise is researching Murusaki-312, a quasar-like phenomena, when the shuttlecraft Galileo is lost on the planet Taurus II. The shuttle is able to regain suborbital height long enough to the surviving crew be retrieved by the departing Enterprise.17

Commander Spock hijacks the USS Enterprise and uses it to return Fleet Captain Pike to Talos.11 Despite the regulations against visiting Talos, Starfleet approves his actions because of the special circumstances involved.18

Starfleet command issues a Code One directive to all commands, indicating that a state of war has broken out between the Federation and Klingon Empire. The USS Enterprise is assigned to secure the co-operation of the planet Organia, a primitive society which is located at a strategic point between the two powers. In fact the Organians are revealed to be enormously powerful and sophisticated non-corporeal entities who stop the war and force an uneasy treaty between the Federation and the Klingons.19

Amongst the other combatants, the Organian intervention comes just in time to prevent six Klingon cruisers from attacking Starbase 47.20

The Enterprise detects time distortions emanating from an uninhabited planet. Investigating, they discover that the effect is being caused by an ancient artefact on the planet, a remnant of a long-vanished civilisation. McCoy, suffering the effects of an accidental drug overdose, travels to 1930s Earth via the portal, disrupting Earth's history. Kirk and Spock are able to use the device to travel back and correct the damage.21

The Enterprise transports over a hundred delegates to the planet Babel for a conference regarding the admission of Coridan to the Federation. Included amongst them is Ambassador Sarek, leading to his first meeting with his son Spock in four years and the first time the two exchange words in 18 years. Despite an attempt to sabotage the conference, the Enterprise succeeds in reaching Babel safely.3

The Enterprise encounters an advanced alien spacecraft whose occupant subdues the crew and removes Spock’s brain. Kirk is able to track down the craft to its home planet and recover the brain, replacing it in the First Officer’s head.22

The Enterprise visits the cloud city of Stratos to pick up a shipment of zenite with which to stop a plague. Despite some local political difficulties, Captain Kirk is ultimately able to collect the shipment.23

USS Reliant, searching for a lifeless planet for use in the Genesis experiment, is seized by Khan Noonian Sing. Sing attempts to steal the Genesis Device, but is engaged in battle by the USS Enterprise under the command of Admiral Kirk. Spock is killed saving the Enterprise from destruction. The USS Reliant is lost in the battle, along with Khan and all of his remaining followers.30

The Enterprise is retired. Scotty is appointed Captain of engineering on the USS Excelsior; Uhura takes a position as a transporter operator on Spacedock. Both abandon their posts along with the rest of the Enterprise senior officers in order to steal the Enterprise and rescue the rejuvenated Spock from the Genesis planet. Unfortunately, the Enterprise is destroyed during the mission and Kirk's son David is killed by the Klingons. The crew proceed to Vulcan in a captured Bird of Prey and succeed in reuniting Spock's Katra with his body.32

The Enterprise-A escorts Chancellor Gorkon to Earth for a peace conference. When Gorkon is assassinated, Kirk uncovers a plot to reverse the recent easing of tensions between the Federation and Klingons.35

The Enterprise-D transports Ambassador Sarek to take part in the Legarans conference, which he has been working towards since 2273. Sarek's participation is threatened when it is discovered that he is suffering from Bendi syndrome. A mind meld with Captain Picard allows Sarek to complete his mission.37

Spock goes to Romulus without authorisation in order to work undercover toward the goal of re-unification. Captain Picard and Lieutenant Commander Data are sent to Romulus in a Klingon Bird of Prey to investigate.38

Captain Picard is able to make contact with Ambassador Spock on Romulus and, with his help, warn the Federation of a Romulan plot to invade Vulcan. With this warning, the Enterprise-D is able to turn back the invasion force. The success is tempered by the death of Spock's father, Sarek, who has long been suffering from Bendi syndrome.39

Kelvin Timeline

Romulus is destroyed in s supernova explosion, despite the efforts of Ambassador Spock to prevent it. The Romulan Nero, enraged by what he views as Spock's betrayal, attempts to destroy Spock's ship. As a result both Nero and Spock are thrown into the past, creating an alternate timeline.43